What is the output of a lexical analyzer when it encounters an unrecognized char

Practice Questions

Q1
What is the output of a lexical analyzer when it encounters an unrecognized character?
  1. A token
  2. A syntax tree
  3. An error message
  4. A symbol table entry

Questions & Step-by-Step Solutions

What is the output of a lexical analyzer when it encounters an unrecognized character?
  • Step 1: A lexical analyzer reads the input text character by character.
  • Step 2: It checks each character to see if it is a valid part of the language's syntax.
  • Step 3: If the analyzer finds a character that it does not recognize, it identifies this as an error.
  • Step 4: The analyzer then generates an error message to indicate that there is an unrecognized character.
  • Step 5: This error message is typically outputted to inform the user or developer about the issue.
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